Analysis of an ancient meteorite from Mars showed that Mars had water 4.4 billion years ago. The name of this meteorite is NWA 7533. The meteorite was found to contain some minerals from the Martian crust that were oxidized. It is assumed that there was water on Mars when the meteorite was formed.
According to a hypothesis, water was created by the impact of meteors and comets on Mars. Another study says that there was water on Mars at the time of creation. The new meteor supports the second theory.
A few years ago, two black meteors from Mars, NWA 7034 and NWA 7533, were discovered in the Sahara Desert. These are new types of meteors from Mars that had a mixture of different types of rocks.
Professor Takashi Mikouchi studied 50 grams of NWA 7533 at the University of Tokyo. These samples are used for four different types of spectroscopic analysis. This study shows that Mars had water 4.4 billion years ago.
The fractured rock in the meteorite was made of magma. Magma contains a lot of oxygen and silicon because magma is mainly composed of silica or silicon dioxide. That is, the oxidation process has taken place here. This means that there is water on Mars at that time. The hydrogen released by this chemical reaction heated up the planet because at that time Mars had a dense atmosphere of carbon dioxide.
That is, it was previously estimated that Mars had water 3.7 billion years ago. Mars is now thought to have had water 4.4 billion years ago.